I apologize for not replying to you. The Argosy is back on the air and
working fine. Cutting the red lead and running it through my old
Tripplett Multi-meter showed at least some of the problem. It looked
like the transistors were a bit over driven so I backed off the driving
amperage a little, and I seem to get good reports. I also cleaned up
the Model 700 mike that came with it and I have been a bit more
sensitive to setting the SSB drive level, The reports seem good so far.
I am planning on taking it portable. What can be nicer than a sandwich
and and a QSO at lunch time. Still working on what antenna to go with.
AD5X has a nice portable vertical that can be adjusted for each band so
no tuner is needed. That seems to be it for now. Throw a 12 V sealed
motorcycle battery in the trunk and I am good to go, as they say.
With a little luck, we might just be able to work eacdh other.
73 for now,
John / WA1JG
On 2/23/2012 11:24 AM, Mike Bryce wrote:
> That's a decoupling cap and it's kind of standard design for solid state
> amplifiers. Just break the connection to the red wire feeding +13 v into the
> PA and insert an amp meter.
> Operate rig into a dummy load.
> BE VERY CAREFUL when working on that PA as the transistors are obsolete and
> TT does not stock them.
> RF parts have a sub but they are not as robust as the original ones.
> Mike wb8vge
> Sent from my iPhone
> On Feb 23, 2012, at 10:35 AM, John<email@example.com> wrote:
>> I have been able to move the back panel out enough to at least see the
>> final amplifier board. I am trying to figure out a safe way to insert a
>> ammeter into the power line to the final. Not there yet.
>> As an aside, it appears that someone has added a 1000 mf electrolytic to
>> ground across the power line (red) to the final. This does not appear
>> in the schematic that is in the manual. Was there a problem with early
>> Argosys that this was meant to cure?
>> John / WA1JG
>> TenTec mailing list
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